U101 (1, 2, 5, 7) signal? : 27MHz CLK 108MHz CLK is oceared at R2005, R2006. Check T1001 Check U100 Samsung Electronics Connect switch and power Pug pin. Check SMPS. Check Front PCB ass'y. Check X100. Check U101. Check U112.
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V : 12.5~14V? T1001 input voltage R2003, L1002 : 5V R2001 : 3.3V T1001 Data, control oddure at R2002~R2004, R2006~R2013, R1015. U500(40~50, 53~63) Data control signal is OK? Check U100. Check U1004. Check U72, U71. Check T1001. Check U500. Samsung Electronics...
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Video signal occur Q807 Emittter? When RF channel tunning, I2C CLK, data are OK? : R166, R168. BD75 is 30 3V? Check MOD801. Samsung Electronics Check U106. Check L801. Check Q824. U801 (12, 14) video signal is OK? Check Q807.
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Troubleshooting NO SPDIF OUTPUT R430 is 5V? Check R430, SMPS. Data waveform U750 Data, CLK occur at R431. : 5, 6, 7, 8. Check J801. Check 750. Samsung Electronics...
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NO S-VIDEO OUTPUT Video signal occur at R405, R417. Check J400. Samsung Electronics Q400, Q403 base video signal? Check Q400, Q430. Check Q400, Q430. Troubleshooting Check BD801. BD801 is 12V? Q401, Q402 base video signal? Check Q401, Q402.
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Troubleshooting NO S/W DOWNLOAD R258, R259 voltage is 8~10V? U200 (11, 12, 13, 14) occur data waveform Check U108. Check U100. Check DB201, RS232 cable. Check U201. Samsung Electronics...
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NO VIDEO (TV SCART, RCA) U801 (12) video signal? U801 (14) signal? Q804, Q807 Emitter signal? R807, R827 signal? Check T802, T801. Samsung Electronics Q826 Base signal? BD801 is 12V? Check Q826 U801 (9, 10, 11) is 0V? Check U801.
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Troubleshooting NO VIDEO OUT (VCR) R878 is 0.4V? Check D805, D806. Q821 collector, signal Q821 base signal Check Q821. Check CP825. Check CP826, R877. Samsung Electronics...
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NO AUDIO OUT Q808, Q809 Base signal? U801 (4, 15, 2, 5) signal? Q702, Q704 Base is High? Check Q702, Q704. Check U100. Samsung Electronics Check Q808, Q809. Check CP807, CP808. Q701, Q703 Emitter signal? U701 (2, 6) signal? Check CS4330.
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